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Stereo Headphone Amplifier with Line Output

                                                      Construction Kit

Model  0347 Stereo Power Amplifier

 

DIY KIT FROM 47 LABORATORY!                                                  

Only the simplest can accommodate the most complex.

                         

*0347 Japanese PDFmanual

Specifications                                                                                          

Power supply:                AC100-120V, 200-240V

Input :                           RCA pin jack system x1(unbalnced)

                                     equipped with RFI filter (radio frequency interference filter)

Impedance :                  50kΩ   (fixed)      

Input sensitivity :           0.775VRMS (30W, maximum output when 8Ω)

Residual noise:              measurement below the detection limit

Amplifier gain:               31dB (approximately 35 times the voltage gain)

Frequency response:      5Hz ~ 120kHz  (within-3dB)

Output terminal:            speaker terminal 

Maximum output power: 40W (4Ω) / 30W (8Ω)

DC output voltage:          Less than 10mV (DC zero adjustment function)

Size:                               W250 x H60 x D175mm

Weight:                          2.7kg (without power cable)

Accessories:                   power cable for AC inlet

 

PDF format assembly manual and technical information (CD-ROM included)

Features                                                                                                  

-  All discrete design

 

-  Current feedback  high slew-rate op-amp design

 

-  Sziklai pair construction (Complementary Darlington)

 

-  Use Low pass filter to block radio frequency interference

 

-  Max. output power 40W (4Ω) / 30W (8Ω)

 

 -

Necessary Tools                                                                                       

- Solder, solder iron (ca 30W)

- Screw drivers

- Nipper, Pliers

- Wire stripper

- Multimeter for voltage measurement

 

 

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